On Jan. 17, 1920, the National Prohibition Act went into effect and ruled the land. Americans had to freshen the taste of some nasty bootleg liquor with juices. Cocktails were in speakeasy heaven. The sidecar, a Paris import, involves a hefty portion of Courvoisier paired with the orange of Cointreau and sparkled up with lemon juice. Americans often use Maker's Mark. It is perfectly acceptable to ask for sugar to coat the rim of the glass. Our favorite is the Dillinger sidecar served at the Hotel Congress, though we don't know if Mr. Dillinger enjoyed one prior to his arrest.